BALF-SPI2-02D3

Overview

The BALF-SPI2-02D3 is an ultra-miniature balun designed for 433 MHz sub-GHz applications. It features a nominal input impedance of 50 Ω and provides a conjugate match to the ST S2-LP transceiver. The device integrates a matching network and harmonics filter, utilizing IPD technology on a non-conductive glass substrate. Key electrical parameters include a phase difference of 2.1°, maximum insertion loss of 3.6 dB, and minimum return loss of 6.5 dB. It operates within the 433–470 MHz frequency range with 50 Ω balanced/unbalanced impedance. The component is housed in a compact 6-WFBGA package with a 0.4 mm pitch.

Feature Summary

• Integrates matching network and harmonics filter for optimized RF performance
• Customized impedance matching specifically for ST S2-LP transceiver
• Utilizes IPD technology on non-conductive glass substrate

Applications

• Sub-GHz RF transceiver systems
• Wireless sensor networks
• Remote control devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct configuration. Confirm that the requested part number matches the exact electrical specifications and package type required for your design. Cross-reference the datasheet revision history to ensure compatibility with current production standards. Ensure compliance with RoHS3 regulations as indicated in the product classification.

Selection Notes

Select this component when designing around the ST S2-LP transceiver for 433 MHz operations. The integrated harmonic filter simplifies the RF front-end design by reducing external component count. Consider the ultra-miniature form factor for space-constrained PCB layouts. Verify that the 6-WFBGA package is suitable for your assembly process and thermal requirements.

Part Context

This balun belongs to the BALF series from STMicroelectronics, which focuses on ultra-miniature solutions for wireless connectivity. The series leverages advanced IPD technology to achieve high performance in small footprints. These components are typically used in conjunction with ST's sub-GHz RFICs to provide efficient signal conversion and filtering.

Replacement Considerations

Public confirmed substitute part numbers: BALF-SPI2-03D3.